Lasting-jack and support



(No Model.) A S CLARK LASTING JACK AND SUPPORT.

No. 412,947. Patented Oct. 15, 1889.

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SAMUEL CLARK, OF ROCHESTER, NEW HAMPSHIRE.

LASTlNG-JACK AND SUPPORT.

SPECIFICATION forming part of Letters Patent No. 412,947, dated October15, 1889. Application filed June 20, 1889. Serial No. 314,989. (Nomodel.)

To all whom it may concern.

Be it known that l, SAMUEL CLARK, a citizen of the United States,residing at Rochester, in the county of Strafford and State of NewHampshire, have invented. certain new and useful Improvements inLasting-Jacks and Supports, of which the following is a specification.

The objects of this invention are to provide a jack which, by thepeculiar construction of its heel and toe piece, will readilyaccommodate itself to any last from childrens sizes to the largest ofmens sizes, and to provide a post upon which to mount the jack, whichmay be easily adjusted to various heights.

The invention will be fully set forth in the following specification andclaims and clearly illustrated in the accompanying drawings, forming aninseparable part thereof, of which- Figure 1 is a sectional elevation ofmy improved jack mounted upon an adjustable supporting-post. Fig. 2 is adetached elevation of the toe-piece. Fig. 3 is a detached sectional viewof a modification of that piece upon which the jack is swiveled, andFig. 4 is a modification of the lower end of the supporting-post and itssocket-piece.

Similar letters indicate like parts throughout the various views.

The jack is made, preferably, in the form shown in the drawings, havingan arm A, rising in the form of a goose-neck, which ter- ,minates in astraight or nearly horizonal arm or projection a, upon which to mount anadjustable toe-rest, and provided also with an arm A, rising at anangle, and cored or slotted at a to receive the lower end of anadjustable hee1rest, as shown. The lower part A of the jack is turned tofit a central perforation b of the jack-block B, thereby forming ashoulder a, which will rest upon the top I) of said block. The bottom ofsaid block may be chambered out at b to receive the upper enlarged endof the supporting-post D, which is preferably formed hollow, as at cl,and upon the lower end of said post is formed a finished journal D,turned to fit a socket E, which should be bolted to the floor. It isoften desirable to adjust said post vertically, in which case thejournal 1) may be threaded to fit a threaded opening 6 in thesocket-piece E, as in Fig. 1; or, if a less rigid support is preferred,the threads maybe omitted from the journal D and its socket-piece E anda suitable spring be placed underneath the said journal. This maybe ofrubber or of metal and made in the form of a helical spring F, as seenin Fig. 4. The top of the supporting-post D is provided with acircumferential groove cl, as seen in cross-section, Fig. 1, into whichthe tips of two or more set-screws B (which are threaded to openingsformed in the lower part of theblocl; B and communicating with thechamber 12) may rest. Thus by loosening said screws B the block B may beadjusted in a rotative course upon the supporting-post, and bytightening the said screws the connection of the block with said postmay be made rigid. A11 adjustable heel rest or block C is ful crumed ato to the arm A of the jack, and is provided with shoulders c", which, bycontact with the top of said arm A, limit its forward and backwardmovcn1ent,in which it is placed to suit the convenience of an operator,in either of which positions it. may be firmly held by means of ahelical spring c ,'mounted upon a rod 0 having its upper end pivoted atc to the bottom of the adjustable heel-block C, and its lower endadapted to play somewhat loosely in an opening made for the purpose inthe bottom of the cored portion a of the arm A, the said helical springoperating expansively between a nut which is threaded to said rod 0 andthe bottom of said cored portion a. A last G is mounted upon theheelbloclc C by means of a spindle g, projecting upward from said blockand entering a hole in said last, said spindle being secured within thesaid heel-block by a set-screw g. The block G of the last is alsosupported by the heel-block C, as seen in Fig. 1. The toe rest or blockC is preferably made in the form shown in the drawings, and may bereadily adjusted upon the arm a. of the jack to various lengths of lastsby means of a setscrew 0 The jack is secured to the block B by means ofa bolt H passing upward through central openings in both, and to which anut h is threaded above said jack. In order that the jack may be moreeasily rotated or swiveled upon the block. B, while still being firmenough to operate upon, said bolt may be made sufficiently long to havemounted upon it a helical spring I, which will work expansively betweenits head h and the under surface of the block B, or between washersprovided upon said bolt for the purpose, as seen in Fig. 1. The jack maybe mounted at an angle upon the said block B, if desired, by

bench-post; and said post D may be prevented from accidentally rotatingby threading a setscrew K to said sleeve J and setting it hard upon saidpost.

To hold the last firmly upon the toe-rest, an ordinary strap L, providedwith a buckle Z, may be perforated at Z to receive a cap-screw M, whichis threaded to an opening in the arm 0,.

Having described my improvements, what I claim as new, and desire tosecure by Letters Patent, is

1. A lasting-jack and its support combining the following elements: apivoted adjustable heel-block provided with a spindle for mounting alast and shoulders for limiting its motion by contact with the arm ofthe jack to which it is pivoted, a horizontal arm and an adjustabletoe-rest provided with a set-screw for securing it at any desired pointupon said arm, a strap provided with a buckle and connected by set-screwto said arm,'a jack-block to which said jack is swiveled, as shown, andprovided with an annular flange at its bottom, a vertically-adj ustablesupport fitting Within the flange of said jack-block and provided withan annular groove in its side, and two or more set'screws threaded tothe flange of said jack-block and adapted to enter and rest in thegroove of said support, all substantially for the purpose set forth.

2. The combination, with an adjustable hollow support having an annulargroove near its top, of a jack-block having its bottom chambered toreceive said hollow support,

provided with set-screws in its sides to enter the groove therein, and asocket in its top, a lasting-jack having a turned portion fitting thesocket in said jack-block, and a bolt passing through both said jack andjack-block,

provided with a helical spring upon its lower end operating eXpansivelyagainst said jackblock.

3. In a lasting jack, a hollow adjustable support, a j ack-block mountedand capable of adjustment in a rotative course thereon, having its topsurface inclined and provided with a socket sunk at right anglestherewith, a lasting-jack having a turned portion fitting the socket insaid jack-block, and abolt passing through both jack and jack-block,provided with a helical spring operating expansively against the latter,all substantially for the purpose specified.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL CLARK.

WVitnesses:

J. B. THURSTON, NATHANIEL E. MARTIN.

